diff --git a/inc/container.class.php b/inc/container.class.php
index 921adf0b..f715f9c3 100644
--- a/inc/container.class.php
+++ b/inc/container.class.php
@@ -355,13 +355,22 @@ function prepareInputForAdd($input) {
          }
       }
 
-      // construct field name by processing label
-      // (remove non alphanumeric char and any trailing spaces)
-      $input['name'] = strtolower(preg_replace("/[^\da-z]/i", "", preg_replace('/s*$/', '', $input['label'])));
-      // if empty, uses a random number
+      // Construct field name by processing label
+      $name = strtolower($input['label']);
+      // 1. remove trailing "s" (plural forms)
+      $name = preg_replace('/s*$/', '', $name);
+      // 2. keep only alphanum
+      $input['name'] = preg_replace('/[^\da-z]/i', '', $name);
+      // 3. if empty, uses a random number
       if (strlen($input['name']) == 0) {
          $input['name'] = rand();
       }
+      // 4. replace numbers by letters
+      $name = str_replace(
+         [0,      1,     2,     3,       4,      5,      6,     7,       8,       9],
+         ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'],
+         $name
+      );
 
       //check for already existing container with same name
       $found = $this->find(['name' => $input['name']]);